User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729) When typing in the location bar, FF searches in the background the history. The CPU load on my machine is 100% during these searches. If the input is made with a traditional keyboard this is no problem, but it conflicts with on-screen keyboards, e.g. on tablet computers, and Windows Text Services Framework (TSF). On-screen keyboards become VERY sluggish and are almost unusable if searching history is enabled. This could probably be avoided at least for TSF without much hassle by better management of process priorities of FF with respect to TSF processes. See instructions on how to enable TSF in FF by its author on: http://www.gottabemobile.com/forum/general-software/6724-gesso-firefox-add-still-being-developed.html Reproducible: Always
Can you please check if Firefox 4.0 improves the situation?
Given that this is not flagged blocking or wanted for the next release, would it be ok to wait for the release of FF 4.0 or would it help if this was tested against the RC?
@mak: I just tested with FF4.0. There appears to be no change in behaviour at all. The on-screen keyboard is still impossible to use on tablet computers due to the high processor load FF incurs.
Arik, there have been some fixes to TSF in recent years. Do you still see this problem?
Wayne, I no longer own a PC with TSF and thus can no longer confirm this bug. Closing it would be ok with me. Many thanks.
perhaps m_kato or alice can test
I do not have tablet PC.
I cannot reproduce this on Windows 8.1 tablet. Although reporter set TSF=true, we already turn on TSF on Nightly. So if this still occurs by TSF, all Nightly users will hit this. But no report on Nightly now.
Thanks for testing. Let's call this WFM